Near MAP Dynamical Delay Estimator and Bayesian CRB for Coded QAM Signals
نویسندگان
چکیده
منابع مشابه
Bayesian Delay Embeddings for Dynamical Systems
Selecting a suitable embedding space is a key issue in modelling nonlinear dynamics. In classical phase-space reconstruction, which relies on time-delay vectors, the embedding space is highly dependent on two discrete parameters (for the univariate case), the values of which greatly affect model performance. They also determine the complexity of the dynamics topology. In consequence, the parame...
متن کاملInvestigation of the time delay difference estimator for FMCW signals
The paper deals with the problem of development of the effective time delay difference estimator of beat signals, obtained by processing the frequency modulated signals. Such beat signals can be formed by the heterodyne scheme of receiver of linear frequency modulated signals with internal coherence. The described problem is actual in many radar applications such as radio direction finding. The...
متن کاملGeneral Log-Likelihood Ratio Expression and Its Implementation Algorithm for Gray-Coded QAM Signals
expression is provided for Gray-coded rectangular quadrature amplitude modulation (R-QAM) signals. The characteristics of Gray code mapping such as symmetries and repeated formats of the bit assignment in a symbol among bit groups are applied effectively for the simplification of the LLR expression. In order to reduce the complexity of the max-log-MAP algorithm for LLR calculation, we replace t...
متن کاملPerformances of Convolutionally-Coded QAM Mapping Non-Coded Bits
The paper analyzes the BER and spectral efficiency performances of convolutionally-coded square QAM constellations that map non-coded bits, besides the coded ones, in an OFDM environment that imposes a user bin with only 81 QAM payloadsymbols. It shows that the QAM constellations that map only coded bits using coding rates higher than 2/3 are outperformed , i.e. higher coding gains and/or soect...
متن کاملTurbo equalization of multilevel coded QAM
A turbo-equalization technique is presented for transmissions, where Q A M constellations are constructed via blockpartitioning as linear combinations of rotated, separately channel-coded BPSK components. The multilevel encoded QAM can be decoded with multistage decoding level-bylevel. Iterative equalization and multistage decoding is performed via soft interference cancellation and MMSE equali...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: IEEE Transactions on Wireless Communications
سال: 2018
ISSN: 1536-1276
DOI: 10.1109/twc.2017.2769043